Roller side bearing.



G. A. JOHNSON.'

ROLLER SIDE BEARING.

APPLICATION FILED MAR.12.1918.

Patented Jan. 7, 1919.

IN V ENTOR. veafgegfzz/z A TTU r GEORGE A. JOHNSON, OF CHICAGO,ILLINOIS, ASSIGNOR 'IO 'illlILIIAll'll I-I. `'.lllIIIhIlEI't, OFCI-IAZY, NEW YORK.

ROLLER SIDEl BEARING.

Specication of Letters Patent.

rarement aan. r, raie.

To all whom t may concern:

Be it known that I, GEORGE A. JOHNSON, a cwitrizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Roller Side Bearings,of which the following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

rIhis invention relates to improvements in roller side bearings.

- One obj ect of this invention is tO provide an anti-friction rollerside bearing, more especially adapted for railway cars, the side bearingbeing so designed that the antifriotion roller will return to normalposition under the influence of gravity after each actuation with aminimum amount ofv friction.

Another and more specific object Of the invention is to provide ananti-friction roller side bearing wherein the anti-friction roller issuspended on floating runways but with the parts so arranged that whenthe side bearing is brought into action, the roller is placed underdirect compression without imposing any load on the journals or trunnionsupports.

In the drawing forming a part of this specilication, Figure 1 is avertical, sectional view, taken transversely of the body and carholsters of a railway car and showin my improvements in connectiontherewith. Fig. 2 is a vertical, sectional view, taken substantially onthe line 2--2 of Fig. 1. And Fig. 3 is a detail perspective of one ofthe floating runways. Y

In said drawing, 10 denotes a portion of atruck bolster of a oar and 1la portion of an Opposed body bolster, it being understood that myimproved side bearing is applied in the usual manner at the ends of theholsters on each side of the center pin by which the holsters areconnected.

As shown, the improved side bearing includes a base or retaining memberA, an anti-friction roller B, runways C-C and springs D-D.

The retaining member A is preferably in the form of a, casting having alower horizontal bearing wall 12, vertically extending end walls lil-13'and vertically entendingV spaced side walls lA-lla rl`he Casting may besecured to the holsters by any suitable means, suoli as the rivets 15,which pass through ears or lugs 16 formed integrally with the casting A.

Fach side wall 14 of the base casting A is recessed on its inner face,as indicated at`17, the 'recesses being so formed as to providedownwardly facing shoulders 18-18 near each end thereof. A floatingrunway C is disposed in each of the recesses 17, each runway C being ofa length to move freely within the recess 17 but limited in its upwardYmovement therein by engagement with Vsaid shoulders 18. Each runway C isof hollow formation and is adapted to have the free ends 19-19 of abowed spring D seated therewithin, as clearly shown by the dotted linesin Fig. 1. The bowed springs l) bear at their bottom ends on the lowerwalls 2O of the recesses 17 and said springs are held against lateralolis-vv placement by any suitable means, such as the danges 21.

Thev anti-friction roller B Vis preferably of solid cylindrical formhaving integral short trunnions 22-22 which rest upon the upper faces ofthe runways C. 'llhe upper faces of the runways C are oppositely andupwardly inclined from the center /thereof as indicated at 23-23.

In actual practice, the roller'Ii will be supported or suspended by thetrunnions 22 from the floatingrunways C and out of engagement with thebottom bearing plate 12 and also out of engagement with the upper bodybolster 11. 'llhe springs D need be of only sufficient strength tosustain the wei eht of the roller I3, and do not have any ot er functionin returning the roller Il to normal position other than elevatingtherunwa s C after the latter have been depressed an the pressureremoved from the roller. When the side bearing is brought into action,the roller B will, of course, be forced downwardly into engagement withthe bottom bearing l2 and rolled to either side of normal, dependingupon the relative movements of the body and truck holsters. rI`he dottedlines in Fig. 1 designate the position of the anti-friction rOllerB atthe end of its travel to the right, as viewed in said ligure. As theroller B is moved to either side of normal.. it is evident that thecorresponding ends of the runways C will be depressed against the actionof the light springs lll. Il the pressure is now removed from the rollerassuming the latter in the dotted line position shown in Fig. 1, theroller B will be ele,

vated due tothe expansion of the springs D and the roller will thenreturn to normalv central positionv under the influence of gravity sincethe trunnions 22 will roll down the inclined surfaces 23 of the runways.

Withthe construction above described, the anti-friction roller is placedunder direct compression when in operation and the trunriio'ns` 22 andrunways C are not required to sustain any of the load, ashas heretoforebeen customary in varioustypes of anti-friction roller side bearings.Furthermore during thereturn of the parts to normal, the roller is leftentirely free of engagement with either the bottom bearing 12 or theupper bolster 11 so that it can readily roll back to central positionunder the influence of gravity with a minimu of friction. As will beunderstood, the Vertical height of the runways C yis made such that thelatter are never brought down into engagement with the bottom walls 2Oof the recesses 17 so that the runways C and springs D can be madeunusually light.

I claim:

1. In an anti-friction bearing, the combination with .a retainingmember, of yfloating runways yieldingly carried by said. member, a lowerbearing surface, and an anti-friction roller normally supported ontrunnions bearing on said runways and out of engagement with saidbearing surface, said runways be ing depressible to permit the roller toengage with said bearing surface when the bearing is in operation andthereby place the roller under direct compression, while the trunnionsare free from load. A

2. In an anti-friction bearing, the combination with a retaining memberhaving an .integral bottom bearing wall and side walls,

of runways having inclined upper surfaces mounted in the side walls ofsaid member, an anti-friction roller having trunnions engaging saidinclined surfaces of the runways, and spring means for normally holdingsaid runways in elevated position and thereby the roller out ofengagement with the bearing wall said runways beingl' depressible topermit the roller to engage said bottom bearing wall.

3. In an anti-friction bearing, the combi nation with a retainingcasting having an integral bottom bearin wall and upstandng side walls,each of said side wallsbeing recessed on its inner face and the recessespro,- Vided with` upper shoulders, of a runway mounted in each recessand limited in its upward movement by said shoulders, a spring` forsupporting each runway in its uppermost position, each runway having itslupper face inclined upwardly in each dig'ection from the centerthereof, and an antifriction roller having trunnions supported by saidrunways, the anti-friction roller being normally held out of engagementwith the bottom bearing wall of the retaining member, the runways beingfdepressible as the roller is moved to eitherside of normal to permitthe roller to engage said bottom bearing wall and adapted to elevate theroller when pressure is removed from the latter and thereby permit therollerto return to,'central position under the influence of gravity andwhile freely supported by said trunnions. j

In witness that I claim the foreoing I have hereunto subscribed my namet is 28th day of Feb., 1918.

Ierronea A. JOHNSON.-

